I don't really buy into the increased sight plane theory. It's a shotgun shooting at close ranges, not a precision rifle. That and you're just pointing rather than aiming, taking fast shots. I think some like the longer ones for the swing feel. Longer barrels won't give you tighter patterns. Look at all the turkey guns with 20" barrels. I personally prefer a shorter barrel and my latest shotgun is a 24". I think 30" and 28" and kind of impractical for real hunting use unless you just drive up to your spot and get out. Wouldn't want to lug a 30" through thick brush!
